Solve Quadratic Equations by Taking the Square Root

Solve for x.

-7(x + 3)² + 63 = 0

• x = 0, 6

• x = -6, 12

• x = -6, 0

• x = 6, 12

Tags

CCSS.HSA-REI.B.4B

x² - 4 = 77

• 9

• -9

• No Real Solutions

• ±9

Tags

CCSS.8.EE.A.2

x² + 1 = 9

• ± √8

• ± 4

• ± 8

• ± 3

Tags

CCSS.8.EE.A.2

(x - 2) ² = 9

• ± 3

• 5  or  -1

• -5  or  1

• ± 9

Tags

CCSS.HSA-REI.B.4B

Tags

CCSS.HSA-REI.B.4B

Solve for x.

5(x - 3)² + 1 = 81

• x = -1, 7

• x = -7, 1

• x = ± 9

• x = 3, 10

Tags

CCSS.HSA-REI.B.4B

x² - 16=0

• x= 4,-4

• x= 8,-8

• x= - 4

• x=8

Tags

CCSS.HSA-REI.B.4B

2x² - 20=180

• x= 10, - 10

• x= 50, - 50

• x= 8, - 8

• x=10

Tags

CCSS.8.EE.A.2

4x² - 1=99

• x=5, - 5

• x=12.5, - 12.5

• x= 4.9, - 4.9

• x= 12.25, - 12.25

Tags

CCSS.8.EE.A.2

Solve using square roots.
4m² - 100 = 0

• m=25, -25

• m=96

• m=5, -5

• m=-96

Tags

CCSS.8.EE.A.2